An Ultra-Thin Near-Perfect Absorber via Block Copolymer Engineered Metasurfaces

被引：7

作者：

Cummins, Cian ^{[1
,2
]}

Flamant, Quentin ^{[1
]}

Dwivedi, Ranjeet ^{[1
]}

Alvarez-Fernandez, Alberto ^{[3
]}

Demazy, Nils ^{[2
]}

Bentaleb, Ahmed ^{[1
]}

Pound-Lana, Gwenaelle ^{[4
]}

Zelsmann, Marc ^{[4
]}

Barois, Philippe ^{[1
]}

Hadziioannou, Georges ^{[2
]}

Baron, Alexandre ^{[1
]}

Fleury, Guillaume ^{[2
]}

Ponsinet, Virginie ^{[1
]}

机构：

[1] Univ Bordeaux, Ctr Rech Paul Pascal, CNRS UMR 5031, 115 Ave Schweitzer, F-33600 Pessac, France

[2] Univ Bordeaux, LCPO, Bordeaux INP, CNRS,UMR 5629, F-33600 Pessac, France

[3] UCL, Dept Chem Engn, Torrington Pl, London WC1E 7JE, England

[4] Univ Grenoble Alpes, LTM, Grenoble INP, CNRS,CEA,LETI Minatec, F-38000 Grenoble, France

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 609卷

关键词：

Block copolymers; Metasurfaces; Perfect absorbers; Nanoresonators; Flat optics; ARRAYS;

D O I：

10.1016/j.jcis.2021.11.163

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Producing ultrathin light absorber layers is attractive towards the integration of lightweight planar components in electronic, photonic, and sensor devices. In this work, we report the experimental demonstration of a thin gold (Au) metallic metasurface with near-perfect visible absorption (similar to 95 %). Au nanoresonators possessing heights from 5 - 15 nm with sub-50 nm diameters were engineered by block copolymer (BCP) templating. The Au nanoresonators were fabricated on an alumina (Al2O3) spacer layer and a reflecting Au mirror, in a film-coupled nanoparticle design. The BCP nanopatterning strategy to produce desired heights of Au nanoresonators was tailored to achieve near-perfect absorption at approximate to 600 nm. The experimental insight described in this work is a step forward towards realizing large area flat optics applications derived from subwavelength-thin metasurfaces. (C) 2021 Elsevier Inc. All rights reserved.

引用

页码：375 / 383

页数：9

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